bug#50767: 28.0.50; Warnings about snprintf in image.c on armv7l

[Eli Zaretskii]

> Date: Thu, 23 Sep 2021 23:49:37 +0100
> From: Alan Third <alan@idiocy.org>
> Cc: 50767@debbugs.gnu.org
> 
> > >> What if xmalloc or snprintf fail?
> > >
> > > Doesn't xmalloc causes some sort of error to occur? I'm not sure.
> > 
> > I think it exits only while Emacs is still initialising itself before
> > entering the top-level command loop, and otherwise frees ballast memory
> > and signals a Lisp error.
> > 
> > At least the second snprintf in svg_load_image does check xmalloc's
> > return value.
> 
> None of the other uses of xmalloc in image.c check the return value
> either, as far as I can see, and I certainly didn't write them all...

AFAIR, there's no need to check the return value of xmalloc, because
it doesn't return if it cannot allocate memory.